CVE-2026-17544

Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9.

Score

CVSS 3.1 9.8 Critical

Status

Analyzed - security@php.net

Published

2026-07-30

Last modified

2026-10-23

Weaknesses

CWE-787

Affected products

• Php (Php)
• Php (Php Group)

References

• https://github.com/php/php-src/security/advisories/GHSA-x692-q9x7-8c3f